The hydrodistilled essential oils from Pistacia vera.L stem exudates have been tested against three bacteria (Escherichia coli; Staphylococcus aureus and Proteus spp) using three methods: agar disc diffusion; determination of MIC (minimum inhibitory concentration) and in the liquid phase by Maruzella method. The results obtained showed that essential oil resin of P. vera L. has antimicrobial activity against gram negative bacteria (E. coli and Proteus spp.) as well as gram positive bacteria (S. aureus); when Proteus spp. was the greatest inhibited of all the strains tested.

The hydrodistilled essential oils from Pistacia vera.L stem exudates have been tested against three bacteria (Escherichia coli; Staphylococcus aureus and Proteus spp) using three methods: agar disc diffusion; determination of MIC (minimum inhibitory concentration) and in the liquid phase by Maruzella method. The results obtained showed that essential oil resin of P. vera L. has antimicrobial activity against gram negative bacteria (E. coli and Proteus spp.) as well as gram positive bacteria (S. aureus); when Proteus spp. was the greatest inhibited of all the strains tested.